Spring-mattress



(No Model.) i 2 SheetsSheet 1.

I. ALTER.

SPRING MATTRESS.

No. 590,202. Patented Sept. 21,1897.

INVENTYOR (No Model.) 1 2 Sheets-Sheet 2. I. ALTER. SPRING MATTRESS.

No. 590,202. Patented Sept. 21, 1897,

WITNESSES INVENTORi w%,- I v km;

JNiTEn f ATEN'I rricn.

SPRING-MATTRESS.

SPECIFICATION forming part of Letters Patent No. 590,202, datedSeptember 21, 1897.

Application filed March 1, 1897. Serial No. 625,451. (No model.) 1

T0 aZZ whom, it may concern.-

Be it known that I, ISAAC ALTER, a citizen of the United States,residing at Lakeport, in the county of Lake and State of California,have invented certain new and useful Improvements in Spring-Mattresses;and I do hereby declare the following to be a full, clear, and exactdescription of the invention,such as will enable others skilled in-theart to which it appertains to make and use the same.

My invention relates to improvements in bed-springs; and it consists incertain novel details of construction, combinations, and arrangements ofparts hereinafter more fully shown and described.

The object of the invention is to provide a simple, cheap, and durableconstruction adapted for application to either cots or beds.

Referring to the drawings, Figs. 1, 2, and

3, the numeral 1 designates a bedstead of ordinary construction providedon each side board 2 adjoining the ends thereof with cleatblocks 3. Thebed-springs comprise two end slats 4: 5, a center slat 6, and a seriesof slats or strips 7, constructed of thin sheets of spring-steel,attached to the said end bars and center bar. In practice the two endbars set down upon and are supported by the said cleat-blocks. Thecenter bar is provided at each end thereof with extensible plate-springs8, connected with the underside thereof and fitting into sockets in theguide-blocks 9, attached to each side board of the bedstead. Thisconstruction permits the longitudinal spring slats or strips to yield,and during this yielding operation the plate-springs 8 expand, and whenthe weight is removed from the spring-frame the said plate-springs serveto assist in restoring the longitudinal slats to their normal positionand thus prevent the slats from being stretched out of shape.

Normally the longitudinal slats are of greater length than the distancebetween the two end bars of the spring and bow or curve upward at thecenter, so that when a weight is placed thereon the spring expandslongitudinally and projects the end bars or pieces farther apart, thecleat-blocks being of sufficient length to permit this motion. Connectedwith each of the said end bars or pieces are plate-springs 9, formedwitha central loop 10 and two semicircular loop portions 11, saidsprings being secured to the end pieces by bolts 12. These springs areadapted to bear against the head-piece and foot-board of the bed andgive when the longitudinal springslats are forced down and are adaptedto relieve the tension thereon and when the weight is removed from thespring-slats return the latter to their normal position. Thus provisionis made for this action at both the sides and ends of the bed-springs,and consequently the spring will always maintain its shape. Thebow-shaped end springs also serve to maintain the longitudinalspringslats in bowed position in order to insure sufficient stifiness orrigidity to the bedstead.

In the construction shown in Figs. 4, 5, and 6 the bed-spring does notrest directly upon the bed, but is connected with a rectangular frame12, said frame being adapted to rest upon the cleats ordinarily providedfor supporting the slats on each sideboard of the bed. This spring isprovided with cleats 13,in which the end pieces or bars of the springare adapted to fit and move, and with the extensible plate-springs 8,connected with the inner bar,

In combination with a bedstead having its side boards provided at eachend with cleatblocks or supports, and at the center with groovedsupports, a bed-spring comprising end bars adapted to rest upon saidcleatblocks, a center bar provided at each end with pendent extensibleplate-springs adapted to rest upon and move in said guide-blocks, Intestimony whereof I have signed this a series oflongitudinally-extending springspecification in the presence of twosnbscrib- :0 metal slats or strips connected with said bars, ingWitnesses.

and a sprin connected with each end bar 5 and adapted to bearrespectively against the ISAAC AL head and foot boards of the bed andmainitnesses: tain the longitudinal spring-slats in proper FRANK HOWE,

position, substantially as described. V. L. RIDEOUT.

